The three suspects are all former employees of the Ocean Centre family resort complex in Praia da Laz where the McCann family was vacationing when she vanished, the reports state.

A wide range of the 160 staff members had access to rooms around the time she disappeared.

Spokespeople for Scotland Yard and the British Crown Prosecution Service declined to comment on the investigation Friday.

The latest theory is that the thieves who snatched Madeleine from her bed were actually staff members of the resort, who knew the layout of the resort and ready escape routes.

A theory widely circulated is that Madeleine startled thieves and they ushered her away to quiet her.

There were no comments on whether the Scotland Yard team believes she is still alive.

The McCann family, which includes younger twin siblings, has held out hope that she remains alive.

Staff would also know the whereabouts of Madeleine’s parents, who dined at a nearby tapas restaurant.

“There were quite a few staff who had access to keys,” Nelson Rodrigues, a former barman at the Ocean Club, told The Guardian. “Reception staff, the cleaners, and the maintenance men could all get into rooms. Waiters and barmen did not have access to keys.

“I remember at the time things belonging to guests went missing now and then,” Rodrigues said. “Mobile phones, cash, anything valuable lying around.”

Reports say that British police, led by Detective Chief Inspector Andy Redwood, also asked Portuguese investigators this week to examine bank records of the three suspects.

There have been several reports of break-ins in the complex around the time that Madeleine vanished.

A Scotland Yard team of four, including the lead investigator in the case, visited with their Portuguese counterparts in Faro, Portugal, earlier this week.

British authorities have also sent formal letters requesting co-operation in recent months.

British and Portuguese police are conducting separate investigations and neither team has made an arrest.